Question

The molecular mass of air, at standard pressure and temperature, is approximately 28.97 g/mol. Calculate the mass of 3.33 moles of air. Next, cancel like terms and units. Which of the following shows the correct terms and units canceled?

A>N>S: 2nd choice

Answer 1

Mass = 96.5 g

Step-by-step explanation:

Given data:

Molar mass of air = 28.97 g/mol

Moles of air = 3.33 mol

Mass of air = ?

Solution:

Number of moles = mass/ molar mass

Mass = Number of moles × molar mass

Mass = 3.33 mol × 28.97 g/mol

Mass = 96.5 g